Yamaha Parts Online I Would Like To Restring A Righty Yamaha Acoustic Guitar To A Lefty. Any Advice On Finding The Right Nut?

I would like to restring a righty Yamaha acoustic guitar to a lefty. Any advice on finding the right nut? - yamaha parts online

I turn my head and change the strings, but the mother is biased towards one side, and I do not think you can simply "flip" it. My online research has revealed no specific piece of Yamaha. Please give me tips for restringing service processes and practices of the screw and possibly a place to buy the mother. Thank you for your help.